[TowerTalk] 40 meter sloper question

[k2qmf at juno.com]

I have a question regarding the 1/4 wave slopers.
The coax shield goes to the tower at the top.
Do you need radials at the base of the tower in order
for the sloper to work properly??
I have a 70 foot tower and would like to try a sloper
for 80 meters.
Thanks in advance for any suggestions...

73,  Ted  K2QMF

On Tue, 10 Oct 2006 20:01:29 +0200 (CEST) LA6FJA/K3RAG Stein Roar
Brobakken <s-roabr at online.no> writes:
> Hi
> 
> I have this same system at 80m, very sharp angle to tower.
> but I bend the last 3 meter of the 1/4 wave back to the tower
> good luck with antenna :)
> 
> 73 LA6FJA K3RAG
> 
> 
> 
> 
> 
> > From: john at kk9a.com
> > Sent: 2006-10-10 18:22:49 CEST
> > To: TOWERTALK at contesting.com
> > Cc: kmohror at comcast.net
> > Subject: [TowerTalk]  40 meter sloper question
> > 
> > With a 1/4 wave sloper, the tower is the radiator.   W8JI would 
> say it's
> > just luck if it works.
> > 
> > John KK9A
> > 
> > 
> > 
> > To: <towertalk at contesting.com>
> > Subject: [TowerTalk] 40 meter sloper question
> > From: "Kirk Mohror" <kmohror at comcast.net>
> > Date: Mon, 9 Oct 2006 21:03:45 -0700
> > List-post: <mailto:towertalk at contesting.com>
> > 
> > Explain this one.
> > 
> > 
> > 
> > Built a 40 meter ¼ wave sloper Sunday. Because of a 3 element 
> quad, I could
> > only put it up at 33 feet. Grounded the shield to the tower and 
> ran 35 feet
> > from the center conductor. Walked the wire out from the base to 
> get an angle
> > of 45 degrees and stated to tune the antenna. Cut about 6 feet off 
> the wire
> > and could not get the swr below 4:1. Moved the wire in closer to 
> the tower
> > and retrimed the wire. Here is the strange part. I got a swr of 
> 1.7:1 only
> > by having the end of the wire about 1 foot off the ground only 8 
> feet from
> > the base of the tower. The wire is tight and is tied to the ground 
> 1 foot
> > from a chain link fence. The fence is 9 feet away from the tower.
> > 
> > When I checked the antenna, it received about 3 to 4 S units 
> higher than a
> > dipole. Have not transmitted on it yet. The 1.7:1 swr is from 7.00 
> Mhz to
> > 7.30 Mhz.
> > 
> > This does not sound right. There wire is too close to the tower, 
> too sharp
> > of an angle and too flat of a swr.
> > 
> > Do I have of fluke of an antenna and should I shut up and just use 
> it? Or is
> > this antenna not right and won?t do me diddily squat?
> > 
> > 
> > 
> > Thanks,
> > 
> > Kirk Mohror
> > 
> > K7EKM
> > 
> > _______________________________________________
> > 
> > 
> > 
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>